
\begingroup
\centering
\begin{tabular}{lcccccc}
   \toprule
    & \multicolumn{3}{c}{\makecell{Patents \\ (mean = 2.24, sd = 1.69)}} & \multicolumn{3}{c}{\makecell{Breakthrough patents \\ (mean = 0.26, sd = 0.44)}}\\
\cmidrule(lr){2-4}  \cmidrule(lr){5-7}
                              & (1)           & (2)           & (3)           & (4)           & (5)           & (6)\\  
   \midrule 
   Surname diversity          &               &               & 0.290$^{*}$   &               &               & 0.012\\   
                              &               &               & (0.161)       &               &               & (0.063)\\   
   Log distinct surnames      & 0.229$^{***}$ & 0.247$^{**}$  & -0.166        & 0.032         & 0.071$^{**}$  & 0.053\\   
                              & (0.058)       & (0.096)       & (0.217)       & (0.022)       & (0.033)       & (0.076)\\   
   Surname dispersion         &               & 0.017         & -0.155        &               & 0.036$^{**}$  & 0.029\\   
                              &               & (0.090)       & (0.104)       &               & (0.017)       & (0.037)\\   
   Population                 & -0.053        & -0.051        & -0.030        & -0.017        & -0.013        & -0.012\\   
                              & (0.044)       & (0.041)       & (0.047)       & (0.016)       & (0.016)       & (0.015)\\   
    \\
   Inventor fixed effects     & $\checkmark$  & $\checkmark$  & $\checkmark$  & $\checkmark$  & $\checkmark$  & $\checkmark$\\   
   Period-State fixed effects & $\checkmark$  & $\checkmark$  & $\checkmark$  & $\checkmark$  & $\checkmark$  & $\checkmark$\\   
   Observations               & 209,944       & 209,944       & 209,944       & 209,944       & 209,944       & 209,944\\  
   \bottomrule
\end{tabular}
\par\endgroup


